656 INDEX. 



Roads Page. 



building and maintenance, investigations 412, 414 



Bureau 



aid of Solicitor on Federal Aid Road Act 474, 481-482 



cooperation with other Federal branches in war work 392-393 



library, work, 1919 346, 347, 349 



report of Chief, 1919 391-426 



war activities, members in military service, etc 391-394 



construction, Work of Roads Bureau 35-42 



Federal aid 



materials tests, Roads Bureau 423 



projects, miles, and types, 1917, 1918, 1919 398-408 



results, and proposed changes in law 35-42, 43, 44 



management and economics, work, 1919 414 



models and exhibits, work, 1919 413 



National Forests 



construction, mileage, cost, etc 197-202 



mileage and cost, by States 409-411 



projects approved by Highways Council 395 



Rodents 



control, work of Biological Survey, 1919 279-283 



relation to forage production, studies 289-290 



Rootworm, com, investigations ^ 248 



Rosin, investigations 232 



Rots, fusarium of corn, investigations 170 



Roundworms 



hogs, investi^tions and control 130 



sheep, investigations and control 130 



Rural 



economies, cooperation, work of Markets Bureau 435-436 



engineering, work of Roads Bureau, 1919 417-419 



Rust 



black-stem, wheat disease, control 521-522 



blister, white pine, cause and control 175-1 76 



Rusts, wheat, barley, and rye, control 168-170 



Rye, leaf rusts control ". 169-170 



Salmon, canned, inspection and studies 214, 221 



Salt, by-product of kelp industry, value 243, 244 



Sauerkraut, spoilage, studies 229 



Sawdust, redwood and spruce, use in grape packing 439 



Scab, wheat, cause and control 170 



Scabies, eradication, work, 1919 74, 75, 110-111, 131 



Schedius kuvanae, introduction, results 264 



Schools 



agricultural teaching, investigations 357-358 



beekeeping 270 



Sea foods, studies by Chemistry Bureau 214, 221-222 



Seaplane, trans- Atlantic flight, aid of Weather Bureau 54-55 



Secretary, Agriculture, report, 1919 3-46 



Seed- 

 congressional distribution 164 



introductions, inspection 159 



marketing, investigations 442 



Reporter, printing and circulation 450 



reporting service, branch offices and voluntary reporters 449-450 



Seeds 



importations, regulations 524-526 



new and rare, distribution 164 



Seismology, investigations 71-72 



Serum 



control work 134 



use in producing immunity against hog cholera 124-124 



Sewellel, habits and control 281 



Sheep 



breeding and handling, parasites, etc 75, 84-86, 110, 130, 131, 132 



farm, investigations and demonstrations 84, 85-86 



feeding, experiments 84-86 



